404055 has 32 divisors (see below), whose sum is σ = 745920. Its totient is φ = 207360.

The previous prime is 404051. The next prime is 404081. The reversal of 404055 is 550404.

It is a happy number.

It is not a de Polignac number, because 404055 - 2² = 404051 is a prime.

404055 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5499 + ... + 5571.

It is an arithmetic number, because the mean of its divisors is an integer number (23310).

2⁴⁰⁴⁰⁵⁵ is an apocalyptic number.

404055 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

404055 is a deficient number, since it is larger than the sum of its proper divisors (341865).

404055 is a wasteful number, since it uses less digits than its factorization.

404055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 404055 is about 635.6532073387. The cubic root of 404055 is about 73.9287724662.

Adding to 404055 its reverse (550404), we get a palindrome (954459).

It can be divided in two parts, 4040 and 55, that added together give a triangular number (4095 = T₉₀).

The spelling of 404055 in words is "four hundred four thousand, fifty-five".